Luther condemned in the Bull is: In puero post baptismum negare remanens peccatum, est Paulum et Christum simul conculcare (ibid.
Summi quos in Republica obtinuerat honores orator ille Romanus, eaque quam servare famam Studiote curabat, in causa fuere quod in Condone Deos non ausus sit negare quamquam in contesta Philosophorum, etc.
Summi quos in Republica obtinnerat honores orator ille Romanus, ea que quam servare famam Studiote curabat, in causa fuere quod in Concione Deos non ansus sit negare quamquam in contesta Philosophorum, etc.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "negare" in a variety of sentences. We hope that you will now be able to make sentences using this word.